Low Noise Operation - Fujitsu AU G18LVLB Series Service Instruction

1-22. LOW NOISE OPERATION

The compressor speed and the outdoor unit fan sp
by External Input.
During the LOW NOISE OPERATION,
"CURRENT OVERLOAD OPERATION", "ECONOMY OPERATION" and "PEAK CUT OPERATION"
are effective, and the outdoor unit operates by lowest current of them.
However, during the DEFROST OPERATION, the compressor operates by the speed
for DEFROST OPERATION.
( Table 15 : Detail of Low Noise Operation )
Low Noise mode
Cooling
LEVEL 1
Heating
Cooling
LEVEL 2
Heating
*The performance drops when operating in the
Capacity priority mode
(1) Operation condition
The function setting is set the "1" for the capacity priority mode.
(2) Check the capacity condition
Shortage Required compressor speed > Limited compressor speed of low noise mode
Required compressor speed < Limited compressor speed of low noise mode
Enough
(3) Operation
When detect the shortage capacity or enough capacity condition continuous 30 minute,
the mode is upped or downed for 1 step.
Automatic switching 1
Level 1 setting
30min
Shortage
Low noise
mode 1
30min
Enough
Outdoor fan speed
(Upper / Lower) [rpm]
AO*G72LRLA AO*G90LRLA
590/510 590/510
590/510 590/510
520/400 520/400
520/400 520/400
Automatic switching 2
Level 2 setting
Low noise
Normal
operation mode 2
eed are limited to reduce the operation noise
Compressor speed
[rps]
AO*G72 AO*G90
48 56
50 57
35 40
37 46
LOW NOISE OPERATION
30min
Shortage
Low noise
mode 1
30min
Enough
01-27
.
30min
Shortage
Normal
operation
30min
Enough